注意幾種時態(tài)的區(qū)別：

(1)一般現在時：表示經常、反復發(fā)生的動作或存在的狀態(tài)。

We study hard at school every day.

He goes to school by bike.

(2)一般過去時：表示在過去某個時候發(fā)生的動作或存在的狀態(tài)，也表示在過去某段時間里經常發(fā)生的習慣性動作。

Did you go there last week?

I went to see my uncle yesterday.

(3)一般將來時：表示在將來會發(fā)生的動作或存在的狀態(tài)。

I’ll come to see you next Sunday.

She is babysitting her sister this weekend.

We are going to Wuhan next Monday.

(4)現在進行時：表示在說話時或現階段正在發(fā)生的動作或存在的狀態(tài)。

Is she listening to music?

He is having a meeting.

(5)過去進行時：表示在過去某個時間正在發(fā)生的動作或存在的狀態(tài)。

What was she doing when you came in?

They were watching TV when I went into the room.

(6)現在完成時：表示在說話時剛剛結束的某一動作或狀態(tài)。

I have learned English for 5 years.

Have you ever been to Singapore?

(7)現在完成進行時：表示某一在過去開始，一直延續(xù)到現在，有可能剛剛結束，也有可能要繼續(xù)下去的動作。

We have been skating for two hours.

She has been learning Chinese since she came to China.

注意各種時態(tài)的構成形式和不同功能。